(532ah) Partial Oxidation of Methane to Value-Added Chemicals Using Metal Carbonate-Based Catalysts

Carbon dioxide (CO₂), a greenhouse gas, significantly causes climate change which urges minimizing the concentration of CO₂ in the atmosphere. One possible way to achieve this goal is capturing CO₂ from the atmosphere or CO₂ emission sources. Metal oxides such as MgO or CaO are used as chemical absorbents to capture CO₂ at various engineering plants, wherein the metal oxides react with CO₂ to form metal carbonates that are stored in the ground or under the sea. In this work, partial oxidation of methane (CH₄) was studied using metal carbonate-based catalysts. The reaction between CH₄ and CO₂ in a gaseous state is thermodynamically unfavorable so the reaction occurs hardly. Unfavorable reaction thermodynamics can be overcome by using metal carbonates in which CO₂ is absorbed as the reactive carbonate species. The metal carbonates species and their reaction conditions for the CH₄ partial oxidation were proposed based on the theoretical phonon calculations, which realized direct CH₄ conversion on the surface of metal carbonates. The results opened new opportunities for metal carbonates as a reactant that can convert CH₄ to useful compounds in an energy-efficient route. The details of the reaction results are going to be discussed in this poster.